/*
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package Behavioral.NullObject;

/**
 *
 * @author Juan
 */
public class Test {
        public static void main(String args[]){
            OperacionAlumnoAbstracta alumno= new Alumno("Juan", "Analista y Programador" );
            OperacionAlumnoAbstracta alumnoNull= new NullAlumno();
            alumno.Duoc();
            alumnoNull.Duoc();
            alumnoNull.print();
            
        }
}
